Method for adjusting supercharging conversion rotation speed of aero engine

Abstract

The invention belongs to the technical field of an aero engine and relates to a process adjusting method for a ground test of the aero engine, in particular to a method for adjusting supercharging conversion rotation speed of the aero engine. By means of the method, repeated test runs of the engine is not required, parts of the engine are not required to be replaced, and production cost is reduced. The method is simple and convenient to operate and improves test run yield of the engine. The method includes the following steps that an ideal conversion rotation speed range of a supercharging conversion valve required by the engine is compared with current actual conversion rotation speed; if actual conversion rotation speed of the supercharging conversion valve is larger than the ideal range, the diameter of a tail nozzle of the engine is reduced through a hydraulic actuator cylinder piston rod; otherwise, the diameter of the tail nozzle of the engine is enlarged through the hydraulic actuator cylinder piston rod until the actual conversion rotation speed of the supercharging conversion valve is adjusted to the ideal conversion rotation speed range.

Description

technical field [0001] The invention belongs to the technical field of aero-engines, and relates to a process adjustment method for an aero-engine ground test run, in particular to an aero-engine supercharging conversion rotational speed adjustment method. Background technique [0002] When an aero-engine is working, the rotor rotates at a high speed, up to tens of thousands of revolutions per minute, and the bearings supporting the rotor have very high requirements for lubricating oil. Due to the high speed, traditional contact sealing methods such as leather cups cannot meet the sealing requirements for lubricating oil, so most of the lubricating oil systems of aero-engines adopt a grate tooth sealing structure. [0003] The structure is composed of lubricating oil chamber, lubricating oil outer chamber, and ventilation chamber. Its working principle is to use the high-pressure air generated by the engine compressor to form a certain pressure gradient sealing gas outside t...

AI Technical Summary

Problems solved by technology

Generally, after a problem occurs, it is necessary to replace the boost conversion valve of the engine repeatedly, and replace the sealing ring to improve the air supply pipeline sealing, but the effect is not obvious, resulting in repeated test runs of the engine. The test cycle before leaving the factory is long, which increases the production cost.

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